exam Maths Puzzle Numerical Ability

The 5 state forest in Texas cover a total of 7000 acres.
What percent of the state forests' area is contained in Siecke, Materson and kirby state forests combined?

Siecke 17
M

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Here is yet another one I got a wrong answer to...I got 6.

(2 + SQRT<2>)(2 + SQRT<2>)

Thanks! 5x/x^2-x-6 - 4/x^2+4x+4

How do you factor this problem out step by step?